20 11 Ellie’s camera uses a convex lens to focus an image onto a film. Look at the diagram of her simple camera with a single lens.
light from distant object
film
lens (a) Complete the diagram to show how an image is produced on the film.
[1]
(b) Ellie’s camera produces an image on the film. What type of image does the camera produce on the film? .............................................................................................................................................. [1] (c) Ellie points the camera at a nearby insect. The image of the insect is not in focus. Describe what must happen to the lens in the camera to focus the image of the insect. ................................................................................................................................................... .............................................................................................................................................. [1] (d) Ellie takes a picture of the insect. The insect is 5 mm long. The image produced on the film is 12.5 mm long. Calculate the image magnification. ................................................................................................................................................... ................................................................................................................................................... magnification = ...........................................................
[2] [Total: 5]
Š OCR 2014